Chemistry Review
NAME______________________
1. ATOMIC THEORY
Identify the scientists who made the following discoveries
a. Bohr
Atoms have specific energy levels (rings).
b.
Schrodinger
Atoms have electron clouds
c.
Rutherford
Atoms contain a dense, positive nucleus; gold-foil experiment
Describe the evolution of the atomic model from the billiard ball model to the electron cloud model.(You can draw pics.)
Circle, circle with nucleus inside, nucleus with rings around, nucleus with clouds around
2. Complete the following table:
Atom or Ion
Average
atomic mass
Mass
Number
Atomic
Number
Number
Of protons
Number
Of electrons
Number
Of neutrons
18.99
19
9
9
9
10
54.94
55
25
25
25
30
30.97
31
15
15
18
16
24.31
30
12
12
12
18
9.01
9
4
4
2
5
F
Mn
P3−
30Mg
Be2+
3. Write the isotope symbol, including atomic number and mass number for the following isotopes. (Isotope symbol
looks like this:
Carbon-14
7
Li
3
Chromium-53
Nickel-63
Zirconium-92
4. Give the electron configuration for each of the following. (You can do the short-hand notation):
F
[He] 2s22p5
F− [He] 2s22p6
Cu [Ar] 4s23d9
Sr [Kr] 5s2
Sr2+ [Kr]
6. What is the primary difference between the MODERN model of the atom and BOHR’S model?
Modern atom has electron clouds, whereas Bohr’s model had specific rings (energy levels). That is because we only
know the probability of where an electron is.
2
8.
PERIODIC TABLE
How did Mendeleev and Mosely arrange the elements in the periodic table? Mendeleev – atomic mass,
Moseley – atomic number
Circle the one in each pair with the larger radius:
Ra or N
Ne or Xe
Circle the one in each pair with the highest first ionization energy:
Cl or Cl
Li or Cs
Ba or
−
Mg or Mg2+
As
9. CHEMICAL BONDING
Are the bonds in the following substances IONIC, POLAR, OR NONPOLAR
MgO ionic
LiCl ionic
Br2
nonpolar
H2O
polar
.
Are the following properties characteristics of ionic, covalent, or metallic bonding?

metallic
Delocalized electrons in an electron sea

ionic
Transfer of electrons

covalent
Do not conduct electricity and have low melting points

covalent
Sharing electrons
Draw a Lewis structure and give the shape for the following molecules
CH4
H2O
Tetrahedral
boron trichloride
bent
bromine gas
trigonal planar
linear
11. Name each of the following:
SO2
CaSO4
Ag2O
sulfur dioxide
H2SO4
calcium sulfate
silver oxide
NaClO3
sulfuric acid
Al(NO3)3
sodium chlorate
Sn(NO3)2 tin (II) nitrate
HCl
aluminum nitrate
Fe2O3
hydrochloric acid
P3O7 triphosphorus heptoxide
iron (III) oxide
N2O5
MgBr2
.
dinitrogen pentoxide
magnesium bromide
.
12. Write formulas for each of the following:
nitrogen dioxide
zinc bormide
NO2
cobalt (III) nitride
ZnBr2
triphosphorus decoxide
tetranitrogen nonachloride
P3O10
N4Cl9
CoN
acetic acid
HC2H3O2
nitric acid
HNO3
iron (III) oxide
Fe2O3
2
potassium chlorite
lead (IV) carbonate
magnesium sulfate
KClO3
Pb(CO3)2
MgSO4
manganese (II) sulfide MnS
.
.
.
.